Drupal is built on PHP so any developer working with Drupal needs some PHP knowledge. PHP memory management is something that can initially be a difficult concept to grasp.
In this Acro Media Tech Talk video, Rob Thornton covers PHP arrays and how they use memory. He goes over various examples, helping to shed some light on how to use arrays effectively. Along the way, Rob discusses passing arrays by value vs. by reference and shares some tips about each.
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